﻿/*
 * Copyright (c) 2011, Andrey Krupa
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Krupa.Pro nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
using System;
using System.Xml;

namespace Krupa.Pro.Web.Utility.XmlSerialization
{
    public static class XmlElementReader
    {
        public static void ReadXml(XmlReader reader, Action onAttribute, Action onElement)
        {
            reader.MoveToElement();
            if (onAttribute != null)
            {
                if (reader.MoveToFirstAttribute())
                {
                    do
                    {
                        onAttribute();
                    } while (reader.MoveToNextAttribute());
                    reader.MoveToElement();
                }
            }
            if (!reader.IsEmptyElement)
            {
                if (reader.MoveToContent() != XmlNodeType.None)
                {
                    while (reader.Read())
                    {
                        switch (reader.NodeType)
                        {
                            case XmlNodeType.Element:
                                {
                                    if (onElement != null)
                                    {
                                        onElement();
                                    }
                                    else
                                    {
                                        throw new FormatException();
                                    }
                                    break;
                                }
                            case XmlNodeType.Comment:
                            case XmlNodeType.Whitespace:
                            case XmlNodeType.SignificantWhitespace:
                                {
                                    break;
                                }
                            case XmlNodeType.EndElement:
                                {
                                    return;
                                }
                            default:
                                {
                                    throw new FormatException();
                                }
                        }
                    }
                }
            }
        }
    }
}